Pedestrian hit by bus, no arrests made?

[untakenname]

Just noticed this clip on the news of a man getting run down by a bus yet miraculously sustaining no serious injury.

http://www.bbc.co.uk/news/av/uk-england-berkshire-...

[quote]
Simon Smith was knocked to the ground by the vehicle while walking along Gun Street. He was able to get back on his feet afterwards and suffered only bruising.
No arrests have been made. Reading Buses say it was an awful incident which is being investigated internally.

[/quote]

Surely it's DWDCA at the very least? If you did that in a car then you'd hopefully be banned for quite a while.